Home / 56,391.28-77,816.60-31,238.96

Finding the Fourth Proportional to 56,391.28, 77,816.60 and 31,238.96

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Solution

The fourth proportional to 56,391.28, 77,816.60 and 31,238.96 is: 43,107.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,391.28 : 77,816.60 = 31,238.96 : x
  2. Step 2: Convert to fraction form
    56,391.28/77,816.60 = 31,238.96/x
  3. Step 3: Cross multiply
    56,391.28x = 77,816.60 × 31,238.96
  4. Step 4: Simplify right side
    56,391.28x = 2,430,909,654.74
  5. Step 5: Solve for x
    x = 2,430,909,654.74/56,391.28
  6. Step 6: Final answer
    x = 43,107.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.